I coulnd't find clear explanations about the production of Iodine-131 in nuclear reactors based on U-235.
Can it be derived directly from U-235 ? In this case : U-235 + neutron -> I-131 + what ???
Or is it derived indirectly from U-235 ? In this case : U-235 + neutron -> X ? -> I-131 (what could be X? And by which process? neutron impact on X or beta-decay of X?)
Thanks for any information.